American Dryer Corp. ML-410 - Manual (Page 36)

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IMPORTANT: Exhaust back pressure measured by a Magnehelic in the exhaust duct should
not exceed 0.5 inches of water column (1.24 mb).
NOTE: Where the exhaust passes through a wall, ceiling, or roof made of combustible materials,
the opening must be 2-inches (5.08 cm) larger (all the way around) than the duct. The
duct must be centered within this opening.
a. Outside Duct Work Protection
1) To protect the outside end of horizontal duct work from the weather, a 90º elbow turned downward
should be installed where the exhaust exits the building. If the duct work travels vertically up
through the roof, it should be protected from the weather by using a 180º turn to point the opening
downward. In either case, allow at least twice the diameter of the duct between the duct opening
and the nearest obstruction.
IMPORTANT: DO NOT use screens or caps on the outside of opening of exhaust duct work.
D. COMPRESSED AIR SUPPLY SYSTEM
The compressed air system of the ML-410 Tilting dryer consists of a number of pneumatic pistons located
throughout the dryer. The pneumatics are actuated by solenoid and flow control valves that are under computer
control. The pneumatic pistons are used to:
• Tilt the Dryer For Loading and Unloading.
• Open and Close The Load and Unload Doors (for ML-410 dryer models equipped with Automatic
Doors)
• Operate The Steam Coil Damper (for MLS-410 Steam Heated Models Only)
• Air Jet is used to clean lint from the blower fan (impellor)